Sorry, had to make two posts, first was too long, I guess to be accepted by MH.
Further, have a look at this statement from the site of the manufacturer of Armour thyroid
, Forest Laboratories, Inc.
" Armour thyroid
is a natural
, porcine-derived thyroid
hormone replacement containing both T4and
Note that the amount of thyroid
hormone in the thyroid
may vary from animal to animal.